D200-83-00
1
I56-1239-01
2112/24R and 2112/24TR Photoelectronic
Smoke Detectors
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
Specifications
Diameter:
5.5 inches (140 mm)
Height (including mounting bracket):
1.7 inches (43 mm)
Weight:
6.8 oz. (190 g)
Operating Temperature Range
Model 2112/24R: 32
°
F to 120
°
F (0
°
C to 49
°
C)
Model 2112/24TR: 32
°
F to 100
°
F (0
°
C to 39
°
C)
Operating Humidity Range:
10% to 93% Relative Humidity, Noncondensing
Latching Alarm:
Reset by momentary power interruption
Heat Sensor (Model 2112/24TR only):
135
°
F Fixed Temperature Electronic Thermistor
Electrical Ratings
System Voltage (nominal):
12 or 24 VDC
Minimum:
10 VDC
Maximum:
35 VDC
Maximum Ripple Voltage:
30% of nom. Voltage (peak to peak)
Standby Current:
50
µ
A maximum
Alarm Current:
28 mA typical, 35 mA max. at 12V
36 mA typical, 45 mA max. at 24V
Reset Voltage:
0.8 VDC minimum
Reset Time:
0.3 seconds maximum
Start-up Time:
30 seconds maximum (after 60 sec. reset)
EOL Relay:
A77-716B, 12/24 VDC
Alarm Initiation and Auxiliary Relay:
1A @ 30 VAC
Contact Ratings, Resistive Load:
1A @ 30 VDC
Figure 1. Wiring diagram for the 2112/24R and 2112/24TR detector:
A78-2336-16
OPTIONAL CLASS A WIRING
EOL RESISTOR
SPECIFIED BY
PANEL
MANUFACTURER
EOL POWER
SUPERVISION
RELAY (SHOWN
ENERGIZED)
A77-716 12/24V
POWER
TO
DETECTORS
UL LISTED
COMPATIBLE
CONTROL
PANEL
INITIATING
LOOP
+
–
P
W
R
A
U
X
P
W
R
A
U
X
+
+
–
A
A
NC
C
NO
+
+
–
A
A
NC
C
NO
ALARM
CONTACT
ALARM
CONTACT
(OPTIONAL)
RELEASING
DEVICE
NC
COMMON
NO
(OPTIONAL)
RELEASING
DEVICE
NC
COMMON
NO
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